| 摘要 |
PURPOSE:To obtain a lubricant which can exhibit excellent lubricating properties under various conditions of use by esterifying a perfluoropolyether terminated with hydroxyl or like groups with a long-chain carboxylic acid or the like. CONSTITUTION:A lubricant comprising an ester of formula I or II (wherein R1 is a perfluoropolyether chain; and R alkyl or fluoroalkyl) which is a compound of a perfluoropolyether terminated with hydroxyl groups with a long-chain carboxylic acid. Alternatively, a lubricant comprising an ester of a perfluoropolyether terminated with carboxyl groups with a long-chain alcohol of formula III or IV (wherein R1 and R2 are as defined above). These lubricants can exhibit excellent lubricating properties under any condition of uses, can retain their effects for a long time, and can improve markebly the running properties and durability of the medium, when applied to the surface of a magnetic layer as lubricants. |
